QuickBooks is an efficient accounting application that enables users to record processed transactions in company records. When recording the payments, you may encounter QuickBooks error 3120, which prevents users from completing the same task. One of the main reasons behind this error is that the transaction you are trying to enter already exists in the record.

Resyncing the transactions in the program can eliminate the QuickBooks error code 3120; however, it is not always the case. Sometimes, you may need to perform additional troubleshooting to fix the error. Read this post until the end to gather all the important information related to the resolution of QuickBooks error 3120.

Dealing with QuickBooks error 3120? Get prompt help Emailing at: [ info@fixqberrors.com].

About QuickBooks Error Message 3120

When recording transactions in QuickBooks, you may encounter an error message on your screen along with the error code 3120. Additionally, it displays different objects that can give rise to the error. For instance, you may notice 14A5D-1435238985 or 800000-1349276859 based on the error reason. The error message looks like this –


QuickBooks has reported the following error:

Object: “X” (Object name with the elaborated error message). 

Error Code: 3120

Severity: Error

QuickBooks Error 3120

Please contact your software vendor.

When this error message appears on your screen, you need to click Yes to continue using the QuickBooks application. Proceeding further, you will have to implement the relevant troubleshooting solutions to fix the QuickBooks error 3120.

Also Read: How to Fix QuickBooks Banking Error 102 and 105

What Are The Common Reasons Behind QuickBooks Desktop Error Code 3120?

Below is the list of the possible reasons that can evoke the error 3120 in QuickBooks:

• Improper mapping of the account is one of the main reasons behind the error.
• If the first exchange is damaged or corrupted.
• Improperly configured QuickBooks Desktop Point of Sale.
• Inappropriate installation of the QuickBooks application.
• No match-up to the QuickBooks application when comparing invoices.
• The user is prompted to close the rapid inventory.

Symptoms of QuickBooks Error 3120

You can identify the problem as error 3120 by keeping an eye on the following symptoms:

• You may not be able to record your transaction due to the error.
• An error message, along with the object name and the error code, will show up on your screen.
• Anomalous behavior of the Windows or the program itself.

After gathering all the crucial information, we can move ahead and troubleshoot the persisting issue.

Things To Consider Before Troubleshooting QuickBooks Error Code 3120

Getting errors when performing a crucial task on your accounting software can be infuriating. You need to resolve it to get the desired task accomplished. Before moving ahead, keeping a few crucial points in your mind can make the troubleshooting smoother:

• In the first place, you need to verify that the payment matches the amount on the invoice sent to the customer.
• Also, make sure that the actual payment and the amount on the invoice sent match in the A/R account.
• In the end, run InvoiceQuery to confirm that the invoice with that particular Transaction ID actually exists in the database.

Read Also: How to Troubleshoot QuickBooks Payroll Error 30159?

Instant Fixes For QuickBooks Error 3120

Now, we have reached the most crucial section of this post, which is error resolution. Below are some tried and tested solutions that can eliminate QuickBooks error 3120:

Solution 1: Setup Accounts in QuickBooks Manually To Fix Error Code 3120

Improperly configured payments and accounts in QuickBooks can give rise to the mapping issue in the program, which is the main reason behind the QuickBooks error 3120. Setting up the accounts manually can resolve the error:

• When in QuickBooks Desktop POS, select Preferences, located underneath the File tab.
• Next, click the Workstation option and then move to the Account Preferences section.
• Now, confirm that the selected account for mapping is correct under both the Basic and Advanced tabs.
• A blank third bracket of the account name indicates a faulty account setup. Here, you need to add an account to the account name section to eliminate the error.
• Now provide the relevant information in the specified boxes in the account name section.
• Thereafter, click Save from under the Options tab.
• Now try to add the transactions to the company records and check if the error is resolved.

If not, try the next troubleshooting solution.

Solution 2: Merge Duplicate Customer Names 

Duplicate customer names in the vendor or customer name are one of the main reasons behind the QuickBooks error 3120. Merging duplicate customer names can help you troubleshoot the error. Follow the below-explained steps to eliminate the error:

• Go to the Customer/Vendor page and navigate through the list.
• Next, right-click the name you want to merge and select the Edit Customer option.
• If you notice Job underneath the customer menu, hover your mouse cursor over the Job, and a cross will show up. Here, you need to drag the cross and place it under the new customer name.
• Now replace the customer/vendor name by typing “Type Customer” and clicking the OK button.
• When you see the Merge Window, hit on the OK button.
• Here, you can edit the Customer/Vendor name by entering the original name.
• After editing, click OK and move back to QuickBooks Desktop.

To Sum It All Up!

QuickBooks error 3120 can prevent you from recording your transactions in the program. This post elaborates on some of the best solutions that can help you eliminate the problem on your own. In case you feel difficulty executing the steps, get in touch with us.